BLT4L is an attempt to port the BLT mod loader for PayDay 2 to Linux. It should be compatible with lua scripts meant for BLT so long as they use platform-agnostic design (e.g. file paths).
It is in early stages and does not yet work fully.
BLT4L uses SubHook to perform runtime code modification in order to hook the statically linked LUA runtime in PayDay 2. A SubHook submodule is present in the repository that has been checked out at a commit that is known to be working. This needs to be built and installed before building BLT4L:
$ git submodule init
$ git submodule update
$ mkdir build
$ cd build
$ cmake ..
$ make
I am a bit out of my element writing C++, as I prefer to use C; however, it is more convenient to use C++ when you're trying to call and overwrite functions in a C++ application. For this reason you may notice a few C-like things in the C++ code. Feel free to correct them and open a PR.
Additionally, I should point out that I am using the linker to access the lua_* functions. This is because (as of 2016-03-22)
the payday2_release image is not stripped (or at least not fully; as is sometimes the case with staticly linked images). For this
reason we can forego signature hunting and the like, as we have symbols and the linker, the ultimate signature system. I've
backed up a copy of the payday image should a stripped update come out and necessitate signatures.